completion: document tilde expansion failure in tests
[gitweb.git] / dir.c
diff --git a/dir.c b/dir.c
index 8ac3d5a973cb3b0d3c322b9d3d9dd319282a47ba..a5926fbd1aeafd468860da7dbd3d8a5d5999a650 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -17,7 +17,21 @@ struct path_simplify {
        const char *path;
 };
 
-static int read_directory_recursive(struct dir_struct *dir, const char *path, int len,
+/*
+ * Tells read_directory_recursive how a file or directory should be treated.
+ * Values are ordered by significance, e.g. if a directory contains both
+ * excluded and untracked files, it is listed as untracked because
+ * path_untracked > path_excluded.
+ */
+enum path_treatment {
+       path_none = 0,
+       path_recurse,
+       path_excluded,
+       path_untracked
+};
+
+static enum path_treatment read_directory_recursive(struct dir_struct *dir,
+       const char *path, int len,
        int check_only, const struct path_simplify *simplify);
 static int get_dtype(struct dirent *de, const char *path, int len);
 
@@ -843,7 +857,7 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
  * Returns the exclude_list element which matched, or NULL for
  * undecided.
  */
-static struct exclude *last_exclude_matching(struct dir_struct *dir,
+struct exclude *last_exclude_matching(struct dir_struct *dir,
                                             const char *pathname,
                                             int *dtype_p)
 {
@@ -865,7 +879,7 @@ static struct exclude *last_exclude_matching(struct dir_struct *dir,
  * scans all exclude lists to determine whether pathname is excluded.
  * Returns 1 if true, otherwise 0.
  */
-static int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
+int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
 {
        struct exclude *exclude =
                last_exclude_matching(dir, pathname, dtype_p);
@@ -874,47 +888,6 @@ static int is_excluded(struct dir_struct *dir, const char *pathname, int *dtype_
        return 0;
 }
 
-void path_exclude_check_init(struct path_exclude_check *check,
-                            struct dir_struct *dir)
-{
-       check->dir = dir;
-}
-
-void path_exclude_check_clear(struct path_exclude_check *check)
-{
-}
-
-/*
- * For each subdirectory in name, starting with the top-most, checks
- * to see if that subdirectory is excluded, and if so, returns the
- * corresponding exclude structure.  Otherwise, checks whether name
- * itself (which is presumably a file) is excluded.
- *
- * A path to a directory known to be excluded is left in check->path to
- * optimize for repeated checks for files in the same excluded directory.
- */
-struct exclude *last_exclude_matching_path(struct path_exclude_check *check,
-                                          const char *name, int namelen,
-                                          int *dtype)
-{
-       return last_exclude_matching(check->dir, name, dtype);
-}
-
-/*
- * Is this name excluded?  This is for a caller like show_files() that
- * do not honor directory hierarchy and iterate through paths that are
- * possibly in an ignored directory.
- */
-int is_path_excluded(struct path_exclude_check *check,
-                 const char *name, int namelen, int *dtype)
-{
-       struct exclude *exclude =
-               last_exclude_matching_path(check, name, namelen, dtype);
-       if (exclude)
-               return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
-       return 0;
-}
-
 static struct dir_entry *dir_entry_new(const char *pathname, int len)
 {
        struct dir_entry *ent;
@@ -1043,35 +1016,26 @@ static enum exist_status directory_exists_in_index(const char *dirname, int len)
  *
  *  (a) if "show_other_directories" is true, we show it as
  *      just a directory, unless "hide_empty_directories" is
- *      also true and the directory is empty, in which case
- *      we just ignore it entirely.
- *      if we are looking for ignored directories, look if it
- *      contains only ignored files to decide if it must be shown as
- *      ignored or not.
+ *      also true, in which case we need to check if it contains any
+ *      untracked and / or ignored files.
  *  (b) if it looks like a git directory, and we don't have
  *      'no_gitlinks' set we treat it as a gitlink, and show it
  *      as a directory.
  *  (c) otherwise, we recurse into it.
  */
-enum directory_treatment {
-       show_directory,
-       ignore_directory,
-       recurse_into_directory
-};
-
-static enum directory_treatment treat_directory(struct dir_struct *dir,
+static enum path_treatment treat_directory(struct dir_struct *dir,
        const char *dirname, int len, int exclude,
        const struct path_simplify *simplify)
 {
        /* The "len-1" is to strip the final '/' */
        switch (directory_exists_in_index(dirname, len-1)) {
        case index_directory:
-               return recurse_into_directory;
+               return path_recurse;
 
        case index_gitdir:
                if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
-                       return ignore_directory;
-               return show_directory;
+                       return path_none;
+               return path_untracked;
 
        case index_nonexistent:
                if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
@@ -1079,77 +1043,17 @@ static enum directory_treatment treat_directory(struct dir_struct *dir,
                if (!(dir->flags & DIR_NO_GITLINKS)) {
                        unsigned char sha1[20];
                        if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
-                               return show_directory;
+                               return path_untracked;
                }
-               return recurse_into_directory;
+               return path_recurse;
        }
 
        /* This is the "show_other_directories" case */
 
-       /* might be a sub directory in an excluded directory */
-       if (!exclude) {
-               struct path_exclude_check check;
-               int dt = DT_DIR;
-               path_exclude_check_init(&check, dir);
-               exclude = is_path_excluded(&check, dirname, len, &dt);
-               path_exclude_check_clear(&check);
-       }
-
-       /*
-        * We are looking for ignored files and our directory is not ignored,
-        * check if it contains untracked files (i.e. is listed as untracked)
-        */
-       if ((dir->flags & DIR_SHOW_IGNORED) && !exclude) {
-               int ignored;
-               dir->flags &= ~DIR_SHOW_IGNORED;
-               ignored = read_directory_recursive(dir, dirname, len, 1, simplify);
-               dir->flags |= DIR_SHOW_IGNORED;
-
-               if (ignored)
-                       return ignore_directory;
-       }
-
        if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
-               return show_directory;
-       if (!read_directory_recursive(dir, dirname, len, 1, simplify))
-               return ignore_directory;
-       return show_directory;
-}
-
-/*
- * Decide what to do when we find a file while traversing the
- * filesystem. Mostly two cases:
- *
- *  1. We are looking for ignored files
- *   (a) File is ignored, include it
- *   (b) File is in ignored path, include it
- *   (c) File is not ignored, exclude it
- *
- *  2. Other scenarios, include the file if not excluded
- *
- * Return 1 for exclude, 0 for include.
- */
-static int treat_file(struct dir_struct *dir, struct strbuf *path, int exclude, int *dtype)
-{
-       struct path_exclude_check check;
-       int exclude_file = 0;
-
-       /* Always exclude indexed files */
-       if (index_name_exists(&the_index, path->buf, path->len, ignore_case))
-               return 1;
-
-       if (exclude)
-               exclude_file = !(dir->flags & DIR_SHOW_IGNORED);
-       else if (dir->flags & DIR_SHOW_IGNORED) {
-               path_exclude_check_init(&check, dir);
-
-               if (!is_path_excluded(&check, path->buf, path->len, dtype))
-                       exclude_file = 1;
-
-               path_exclude_check_clear(&check);
-       }
+               return exclude ? path_excluded : path_untracked;
 
-       return exclude_file;
+       return read_directory_recursive(dir, dirname, len, 1, simplify);
 }
 
 /*
@@ -1264,56 +1168,40 @@ static int get_dtype(struct dirent *de, const char *path, int len)
        return dtype;
 }
 
-enum path_treatment {
-       path_ignored,
-       path_handled,
-       path_recurse
-};
-
 static enum path_treatment treat_one_path(struct dir_struct *dir,
                                          struct strbuf *path,
                                          const struct path_simplify *simplify,
                                          int dtype, struct dirent *de)
 {
-       int exclude = is_excluded(dir, path->buf, &dtype);
-       if (exclude && (dir->flags & DIR_COLLECT_IGNORED)
-           && exclude_matches_pathspec(path->buf, path->len, simplify))
-               dir_add_ignored(dir, path->buf, path->len);
+       int exclude;
+       if (dtype == DT_UNKNOWN)
+               dtype = get_dtype(de, path->buf, path->len);
+
+       /* Always exclude indexed files */
+       if (dtype != DT_DIR &&
+           cache_name_exists(path->buf, path->len, ignore_case))
+               return path_none;
+
+       exclude = is_excluded(dir, path->buf, &dtype);
 
        /*
         * Excluded? If we don't explicitly want to show
         * ignored files, ignore it
         */
-       if (exclude && !(dir->flags & DIR_SHOW_IGNORED))
-               return path_ignored;
-
-       if (dtype == DT_UNKNOWN)
-               dtype = get_dtype(de, path->buf, path->len);
+       if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
+               return path_excluded;
 
        switch (dtype) {
        default:
-               return path_ignored;
+               return path_none;
        case DT_DIR:
                strbuf_addch(path, '/');
-               switch (treat_directory(dir, path->buf, path->len, exclude, simplify)) {
-               case show_directory:
-                       break;
-               case recurse_into_directory:
-                       return path_recurse;
-               case ignore_directory:
-                       return path_ignored;
-               }
-               break;
+               return treat_directory(dir, path->buf, path->len, exclude,
+                       simplify);
        case DT_REG:
        case DT_LNK:
-               switch (treat_file(dir, path, exclude, &dtype)) {
-               case 1:
-                       return path_ignored;
-               default:
-                       break;
-               }
+               return exclude ? path_excluded : path_untracked;
        }
-       return path_handled;
 }
 
 static enum path_treatment treat_path(struct dir_struct *dir,
@@ -1325,11 +1213,11 @@ static enum path_treatment treat_path(struct dir_struct *dir,
        int dtype;
 
        if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
-               return path_ignored;
+               return path_none;
        strbuf_setlen(path, baselen);
        strbuf_addstr(path, de->d_name);
        if (simplify_away(path->buf, path->len, simplify))
-               return path_ignored;
+               return path_none;
 
        dtype = DTYPE(de);
        return treat_one_path(dir, path, simplify, dtype, de);
@@ -1343,14 +1231,16 @@ static enum path_treatment treat_path(struct dir_struct *dir,
  *
  * Also, we ignore the name ".git" (even if it is not a directory).
  * That likely will not change.
+ *
+ * Returns the most significant path_treatment value encountered in the scan.
  */
-static int read_directory_recursive(struct dir_struct *dir,
+static enum path_treatment read_directory_recursive(struct dir_struct *dir,
                                    const char *base, int baselen,
                                    int check_only,
                                    const struct path_simplify *simplify)
 {
        DIR *fdir;
-       int contents = 0;
+       enum path_treatment state, subdir_state, dir_state = path_none;
        struct dirent *de;
        struct strbuf path = STRBUF_INIT;
 
@@ -1361,26 +1251,53 @@ static int read_directory_recursive(struct dir_struct *dir,
                goto out;
 
        while ((de = readdir(fdir)) != NULL) {
-               switch (treat_path(dir, de, &path, baselen, simplify)) {
-               case path_recurse:
-                       contents += read_directory_recursive(dir, path.buf,
+               /* check how the file or directory should be treated */
+               state = treat_path(dir, de, &path, baselen, simplify);
+               if (state > dir_state)
+                       dir_state = state;
+
+               /* recurse into subdir if instructed by treat_path */
+               if (state == path_recurse) {
+                       subdir_state = read_directory_recursive(dir, path.buf,
                                path.len, check_only, simplify);
+                       if (subdir_state > dir_state)
+                               dir_state = subdir_state;
+               }
+
+               if (check_only) {
+                       /* abort early if maximum state has been reached */
+                       if (dir_state == path_untracked)
+                               break;
+                       /* skip the dir_add_* part */
                        continue;
-               case path_ignored:
-                       continue;
-               case path_handled:
-                       break;
                }
-               contents++;
-               if (check_only)
+
+               /* add the path to the appropriate result list */
+               switch (state) {
+               case path_excluded:
+                       if (dir->flags & DIR_SHOW_IGNORED)
+                               dir_add_name(dir, path.buf, path.len);
+                       else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
+                               ((dir->flags & DIR_COLLECT_IGNORED) &&
+                               exclude_matches_pathspec(path.buf, path.len,
+                                       simplify)))
+                               dir_add_ignored(dir, path.buf, path.len);
+                       break;
+
+               case path_untracked:
+                       if (!(dir->flags & DIR_SHOW_IGNORED))
+                               dir_add_name(dir, path.buf, path.len);
                        break;
-               dir_add_name(dir, path.buf, path.len);
+
+               default:
+                       break;
+               }
        }
        closedir(fdir);
  out:
        strbuf_release(&path);
 
-       return contents;
+       return dir_state;
 }
 
 static int cmp_name(const void *p1, const void *p2)
@@ -1451,7 +1368,7 @@ static int treat_leading_path(struct dir_struct *dir,
                if (simplify_away(sb.buf, sb.len, simplify))
                        break;
                if (treat_one_path(dir, &sb, simplify,
-                                  DT_DIR, NULL) == path_ignored)
+                                  DT_DIR, NULL) == path_none)
                        break; /* do not recurse into it */
                if (len <= baselen) {
                        rc = 1;